磷酸鈦氧鉀(KTP)

 

磷酸鈦氧鉀(KTP)最常用于倍頻Nd:YAG及其他摻Nd晶體的激光,特別是在中低功率密度的激光器中。到目前為止,利用KTP進行腔內與腔外倍頻的摻Nd晶體的激光器,在逐步取代可見光染料激光和可調藍寶石激光器。廣泛使用實驗室和醫學系統, 射程探測器,激光雷達,光通信和工業激光系統。

Advantages:
  • Large Nonlinear Optical (NLO) Coefficients
  • Wide Angular Bandwidth and Small Walk-off Angle
  • Broad Temperature and Spectral Bandwidth
  • High Electro-Optic (E-O) Coefficient and Low Dielectric Constant
  • Large Figure of Merit for an Optical Waveguide Modulator
  • Nonhygroscopic, Good Chemical and Mechanical Properties

Capabilities:

Aperture:
2x2 ~ 10x10mm
Lenght:
0.1 - 20mm
Cutting Angle q and f:
Determined by different kinds of homonic generartion
Phase matching type:
Type I or Type II
End Configuration:
Plano/Plano or Brewst/Brewst or Specified


Specifications:

Angle tolerance:
Δθ< ± 0.5°; Δφ< ±0.5°
Dimensional Tolerance:
(W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm)
Flatness:
<λ/8 at 633nm
Surface Quality:
10/5 Scracth/Dig
Parallelism:
< 20 arc seconds
Perpendicularity:
< 5 arc minutes
Wavefront Distortion:
<λ/8 at 632.8nm
Clear Aperture:
Central 95%
Chamfer:
0.15x45°
Coating:
a) * S1,S2: AR @ 1064 nm R<0.1% & 532nm R<0.25%
b) * S1:HR @ 1064nm R>99.8% & [email protected] 808nm T>95%
S2:AR @ 1064 nm R<0.1% & 532nm R<0.25%

Prorerties:

Crystal structure
Orthorhombic, point group mm2
Melting point
1172°C incongruent
Cell parameters
a=6.404?, b=10.616?, c=12.814?, Z=8
Curie point
936°C
Mohs hardness
~5
Density
3.01 g/cm3
Color
colorless
Hygroscopic susceptibility
no
Specific heat
0.1643 caλ/g.°C
Thermal conductivity
0.13 W/cm/°K
Electrical conductivity
3.5x10-8 s/cm (c-axis, 22°C, 1KHz)
Transmitting range
350nm~4500nm
Refractive indices
-
nx
ny
nz
1064nm
1.7377
1.7453
1.8297
532nm
1.7780
1.7886
1.8887
Absorption coefficients
a < 1%/cm @1.064μ m and 0.532μ m
Phase matchable range
0.984 - 3.4 μ m
Therm-optic coefficients
dnx/dT=1.1x10-5/°C, dny/dT=1.3x10-5/oC, dnz/dT=1.6x10-5/°C
Nonlinear optical coefficients
d31=2.54pm/V, d31=4.35pm/V, d31=16.9pm/V
d24=3.64pm/V, d15=1.91pm/V at 1.064 mm
deff(II)≈(d24 - d15)sin2Φsin2Θ - (d15sin2Φ?+ d24cos2Φ)sinΘ
Electro-optic coefficients
-
Low frequency(pm/V)
High requency(pm/V)
γ13
γ23
γ33
γ51
γ42
9.5
15.7
36.3
7.3
9.3
8.8
13.8
35.0
6.9
8.8
Dielectric constant
eeff=13

Sellmeier equations
nx2=3.0065+0.03901/(l2-0.04251)-0.01327l2
ny2=3.0333+0.04154/(l2-0.04547)-0.01408l2
nz2=3.3134+0.05694/(l2-0.05658)-0.01682l2

 

Note: Kinds of sizes, coating are available upon request.


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